package edu.zju.gis.cky.global;

import edu.zju.gis.cky.entity.Result;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * @author Zhou Yuquan
 * @version 1.0, 2021-12-10
 */
@RestControllerAdvice
public class ResponseBodyWrapper implements ResponseBodyAdvice<Object> {

    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        Class<?> containingClass = returnType.getContainingClass();
        return containingClass != GlobalExceptionHandler.class;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (body == null) {
            return Result.success();
        } else {
            return Result.success(body);
        }
    }
}
